Pump



FIG. 1 is a right side elevational view of a pump showing my new design, the left side being a mirror image of that shown;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a top, rear and right side perspective view thereof; and

FIG. 7 is a bottom, front and right side perspective view thereof. 

The ornamental design for a pump, as shown and described. 